/Engine/Source/Editor/GraphEditor/Public/SGraphNodeKnot.h
If bHoveredCommentVisibility is true, hides the comment bubble after a change is committed
virtual void OnCommentTextCommitted ( const [FText](API\Runtime\Core\Internationalization\FText) & NewComment, [ETextCommit::Type](API\Runtime\SlateCore\Types\ETextCommit__Type) CommitInfo )